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An_258558 posted:
I had a root canal performed on my front tooth about 5 years ago. Since then it has been fairly sensitive and painful on occasion. I have recently started a home teeth whitening treatment from my dentist and the tooth has been throbbing badly as a result. The pain is all over and sensitive when touched.

Is this normal? If not how can I treat it?
steffanymohan responded:
If the pain still persists even after your root canal treatment, this indicates that the treatment has not been successful. Some signs of failed root canal treatment includes tooth pain and tenderness or swelling in the gums and near the tooth. Avoid chewing sticky foods and hard substances. Rinse your mouth with warm salt water to reduce pain and swelling. And consult a dentist immediately.

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